The cages I am looking at are 20X20x18. I was planning on putting 3 hens to one roo in it. Do you think that will work? Tks This is what I am thinking about using. I have one local for 80 bucks I was thinking if I built it, it would cost that much. http://www.bird-supplies.net/breeders-quad-king-cage.htm Also, If I build something larger, can I put say 20 hens with 5 roos or is that a bad idea.